The most recent Linux kernel releases are: 7.1, 7.0, 6.19, 6.18, …:

* https://en.wikipedia.org/wiki/Linux_kernel_version_history

7.0 is already present in forky (current testing), and available as a backport for trixie (current stable):

* https://packages.debian.org/search?keywords=linux-image-amd6...

* https://packages.debian.org/trixie-backports/linux-image-amd...

The default kernel for trixie/stable is 6.12, initially released in November 2024, and officially supported upstream until December 2028.